85779171 has 12 divisors (see below), whose sum is σ = 124203040. Its totient is φ = 57047760.

The previous prime is 85779157. The next prime is 85779191. The reversal of 85779171 is 17197758.

It is a happy number.

85779171 is a `hidden beast` number, since 8 + 577 + 9 + 1 + 71 = 666.

It is not a de Polignac number, because 85779171 - 2⁶ = 85779107 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85779131) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7531 + ... + 15108.

Almost surely, 2^85779171 is an apocalyptic number.

85779171 is a deficient number, since it is larger than the sum of its proper divisors (38423869).

85779171 is a wasteful number, since it uses less digits than its factorization.

85779171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23066 (or 23063 counting only the distinct ones).

The product of its digits is 123480, while the sum is 45.

The square root of 85779171 is about 9261.7045407419. The cubic root of 85779171 is about 441.0223660892.

The spelling of 85779171 in words is "eighty-five million, seven hundred seventy-nine thousand, one hundred seventy-one".